monitoring and forecasting of air quality parameters in urban areas is considered as one of the challenges of the human environment. it depends on several factors such as topography, climate, population and transport network which the interaction of these spatial factors has been as a dynamic phenomenon, non-linear and ambiguous. in this study, two models suggested to predict and modeling conce...

A series of interactive web simulation models were developed to help students understand the coupled physical, chemical, and microbiological processes that affect the transport and fate of pollutants in groundwater. Conventional models that simulate coupled processes are often not effective learning tools because they are too complex, they suffer from cumbersome interfaces, and/or they are diff...

A three-dimensional meteorological model and a Lagrangian particle dispersion model are used to study the e€ects of a uniform large-scale wind on the dispersion of a non-reactive pollutant in a coastal region with complex terrain. Simulations are carried out both with and without a background wind. A comparison between model results and measured data (wind and pollutant concentrations) indicate...

Antalya Bay is located in the Mediterranean Sea of Turkish coasts. City of Antalya is one of the major tourism cities of Turkey with an increasing population. The sea outfall was constructed in the Antalya Bay. In this study, the currents and wind have been observed and measured. The wave height distribution, current pattern and pollutant concentration have been presented. Wind driven currents ...

This paper presents results of comprehensive analyses of data from the first 122 commercially available wireless environmental pervasive sensors (motes), developed by Newcastle University and deployed in England. Measurements of pollution, meteorology and traffic are used to investigate the complexity of the physical and chemical processes governing the levels of traffic-related pollution in ur...

In this paper, pollutant dispersion from point source was investigated numerically in an urban area. Numerical simulations were carried out using Computational Fluid Dynamics (CFD) models. The CFD models used for the simulation were based on the steadystate Reynolds-Average Navier-Stoke equations (RANS) with κ-ε turbulence models. A gas pollutant was emitted from a point source within the wake ...

Different approaches allowing the prediction of pollutant transport in rivers have attracted a great deal of attention among scientists throughout the world. Unfortunately, the prerequisite for running most of the proposed models is the detailed information about the hydraulic and morphometric conditions of the considered river. Even when the simplest advection-diffusion model is planned to be ...

Aquatic organisms can take up organic pollutants from their environment and subsequently excrete the pollutant or its biotransformation products (metabolites). Phase II (conjugation) biotransformation products are almost always less toxic than the unmetabolized organic pollutant. For many organic pollutants, the extent to which conjugates are formed is extremely important in determining the rat...

A re®ned three-dimensional layer-integrated model to predict accurately salt and cohesive sediment transport in estuarine waters is described herein. A splitting algorithm has been used to split the three-dimensional transport equation into a horizontal twodimensional equation and a vertical one-dimensional equation due to the di€erent length scales. An additional source term associated with th...

Role of mathematical models and of field measurements in solving water quality problems is described. When simulating phenomena in different space and time scales there are some important differences, regarding forcing factors, time averaging and measuring technique. Two case studies are presented: (a) Modelling of mercury cycling in Trieste Bay. 2D Hydrodynamic model Is used together with a se...